Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c66d348f4d0d696…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 22:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a3a12a93d5edc1e37cc1738e17ba15 SHA-1: 2c956db39d4891b7fc821156c0f818e877b267e3 SHA-256: 0c66d348f4d0d696a20f53ecd8f50a29dbc65be928613c385d1d90800f42a1b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, disguised as a form for "e verify form i 9 compliance". This indicates a phishing attempt to trick users into visiting a potentially harmful site. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=e+verify+form+i+9+compliance
    • http://files.livefreeandfarm.com/uploads/1/3/1/1/131163969/d1cc00d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/gotudojigosakajox.pdf
    • https://cdn.shopify.com/s/files/1/0449/9256/1310/files/80736096543.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/2018_answer_key_ias.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/1967_mustang_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/wozofibumejajaval.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/19339037681.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/lilozusis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5069/5830/files/bixevolepuzoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/damipotubuwis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/porakusakufewubolezere.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/bezotexuxegowebig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000571f.bin
fdcd92b2aa689a0459cb2ef749f6cf4a0aa5cf144b9ccf71a62a7c14363e62be
pdf-font-stream PDF embedded font (sfnt) at offset 0x571F 5260 bytes
font_01_sfnt_off000068fa.bin
97efc196f22f20399830be93b0e15a9391e1e3218f2472d6cc0879afb35f632a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 9916 bytes